TROX USA, Inc.

4305 Settingdown Circle www.troxusa.com

Cumming, GA 30028 e-mail trox@troxusa.com

Telephone 770.569.1433

Facsimile 770.569.1435

Active Chilled BeamsDID-V

with welded condensate tray

T 2.4/12/US/4

Contents · Description

2

Description 2

Dimensional data • Coil & casing arrangements 3

Installation 4

Nomenclature/Performance notes 5

Description

TROX DID-V active chilled beams have a vertical coil which can be

installed out of view in the ceiling plenum with a linear bar grille or slot

diffuser (provided by others), offering an alternative look to a more

traditional overhead chilled beam. The DID-V has an integral welded

condensate tray which enables their use in schools and other applica-

tions involving operable windows or operation in other scenarios

where maintenance of precise space humidity levels is difficult.

The design and positioning of the induction nozzles within the DID-V

active chilled beam enhance the amount of plenum air drawn across

the internal heat exchanger. This provides high cooling outputs with

low amounts of primary air.

The beams discharge characteristics also allow for high levels of

cooling without the penalty of high terminal velocities (normally

associated with high induction chilled beams) into the occupied zone,

making the DID-V particularly well-suited for perimeter zones with

high sensible loads where comfort must be maintained.

The high water to airside cooling ratio with primary air volume means

the DID-V is ideal for use with dedicated outdoor air system (DOAS)

designs.

Special features

• High cooling capacity with low primary airflow rates

• Heat exchangers for two or four pipe systems

• Cooling and/or heating is possible

• Welded condensate trays with or without piping connections

The active chilled beams contain a primary air chamber with

induction nozzles, vertical heat exchanger and, as standard, a

rear inlet for the connection of the primary air.

Additional information can be found on our website, including

the Chilled Beam Design Guide and selection programs.

Functional Description

Active chilled beams supply conditioned fresh air (primary air) to the

space from a central air handling unit (AHU). This air is required to

maintain indoor air quality while providing additional cooling and/or

heating using an integral heat exchanger.

The primary air is discharged into the beam mixing chamber from the

primary air chamber via induction nozzles. This causes plenum air to

be induced through a vertically mounted heat exchanger and mixing

with the primary air. This mixture is then discharged into the space

through a linear bar grille or slot diffuser.

There are two types of heat exchange coils, a two-pipe system for

cooling or heating (using a changeover mode) and a four-pipe system

which enables any room to be cooled or heated independently.

Caution!

The chilled water system must be designed to prevent the

temperature of the water supplied to the heat exchanger from

falling below the room dew point to ensure that the beam

provides sensible cooling only. Chilled beam systems should

not be designed to condense.

The primary air fed to the beams must be pretreated at the

AHU to maintain the required ventilation and humidity control

of the space.

Quick selection table 6

Selection program description 6

Specification/Order details 7

Principle of operation DID-V

Conditioned primary air

Induced plenum air

Supply air(primary + induced)

Primary airchamber

Single rowInductionnozzles

Mixingchamber

Primary air connection

Primary air chamber

Water connections

Induction opening

Hanging brackets

6

5

4

3

2

1

Condensate connection

1

2

3

5

6

4

DID-V Features

Dimensional data • Casing Arrangements

3

Characteristics

• Primary airflow range from 25 to 360 cfm• For mounting heights of 8 to 15 ft• Rear (standard) primary air connection• Lengths of 4, 5 and 6ft (other lengths on request, cost option)• Installs above the ceiling• Nozzles in three sizes to optimize induction• Heat exchangers for two- or four-pipe systems • Maximum operating pressure: 250 psi• Maximum operating temperature: 165˚F to 200˚F

(other operating pressures and temperatures upon request)

Construction features

• Primary air connections suitable for circular connecting ducts• 2 galvanized steel hanging rails for on-site installation• Water connections on left or right of vertical coilMaterials

• Casing, nozzle plate, hanging rails and primary air connection made of galvanized sheet steel with natural finish

• Hanging rails of galvanized sheet steel• Heat exchanger made of copper tubes and formed

aluminum fins• Heat exchanger natural finish (standard)

11

Standard construction with 2-pipe coil

12"

8½"

14"

Available nominal lengths (LN): 48”, 60” and 72”Beam height: 12”

LN

12"

Coil and casing options

DID-V series beams are fitted with a 2-row coil, which can be supplied by a single set of water pipes (referred to as a 2 pipe coil) or connected toseparate chilled and hot water piping circuits (hereby referred to as a 4 pipe coil). The primary (larger) circuit in 4 pipe coils commonly acceptschilled water while the smaller secondary circuit is connected to a hot water supply. All piping connections are ½˝ straight copper pipe (⅝˝ OD). Asa cost option, ½˝ NPT (male) fittings are available.

• All water connections are plain ends as standard • Male NPT fittings are an available option (A2)

Casing Arrangements

Right hand water connectionsDID-V...MR

Left hand water connectionsDID-V....ML

LN = L + 1”

Installation

4

DID-V active chilled beams are provided with at least two

hanging rails along the top of the beam.

The beam is installed on site using wire or metal hangers (provided

by others) according to applicable building codes.

The coil connections can be plain-ended for soldered connections or

provided with ½¨ male NPT fittings (cost option) for connection with

flexible hoses (recommended option). Using NPT fittings and flexible

hoses allows for adjustments of minor misalignment of the beam and

supply/return ductwork and for movement of the beam to align with a

modular ceiling. Each coil is factory tested for leakage and

provided clean and capped off. TROX USA offers high quality

stainless steel braided flexible hoses in 12”, 18” or 24” lengths with

NPT fixed and swivel joints.

Flexible hose (cost option)

For water connection ½˝ NPT

Min. bending radius

L = 12”, 18”, 24”

Female swivel thread for

connection to beam

Caution - Weight must not be supported by ceiling grid!

Male fixed thread for connection

pipe header

2 ½

¨

3¨

5

Nomenclature • Performance Notes

Q·

SEN in Btu/h: Space sensible load

Q·

LAT in Btu/h: Space latent load

V· Pr in cfm: Primary airflow rate to offset space latent gains

V· HW in gpm: Water volume flow rate, heating

V· CW in gpm: Water volume flow rate, cooling

V· supply in cfm: Discharge flow rate

Q·

Pr in Btu/h: Primary air cooling capacity

Q·

HW in Btu/h: Water heating capacity

Q·

CW in Btu/h: Water cooling capacity

Q·

tot in Btu/h: Total beam thermal capacity

WROOM in gr: Room humidity ratio

WPr in gr: Primary air humidity ratio

Δw in gr: Difference between room and primary air humidity ratio

ΔtPr in °F: Difference between room air and primary air temperatureΔtW in °F: Supply to return water temperature difference

ΔtRW in °F: Difference between room air and water supply temperature

Δpt in in. H20: Air pressure drop

ΔpW in ft. H20: Water pressure drop

tR in °F: Room temperature

tHWS in °F: Water supply temperature, heating

tHWR in °F: Water return temperature, heating

tCWS in °F: Water supply temperature, cooling

tCWR in °F: Water return temperature, cooling

tPr in °F: Primary air temperature

L in fpm: Air velocity distance L

H1 in fpm: Air velocity distance H1

A in ft: Spacing between two diffusers with opposing blow patterns

L in ft: Horizontal and vertical distance (x+H1) discharge to the wall

H1 in ft: Distance from ceiling to occupied zone (5΄ 6˝ above the floor)

Δto in ft: Temperature difference room air and beam discharge temperature

0.50 0.75 1.00 1.25 1.50 2.00

0.80 0.92 .97 1.00 1.02 1.04

0.2 0.4 0.7 1.0 1.4 2.4

Coil Water Flow Rate, GPM

Table 1: Corrections for other water flow rates

Table 2a: Corrections for other chilled water supply temperatures

Table 2b: Corrections for other hot water supply temperatures

10 12 14 16 18 20

0.56 0.67 0.78 0.89 1.00 1.11

tR - tCWS

20 30 40 50 60 70

0.40 0.60 0.80 1.00 1.20 1.40

tHWS - tR

Multiply QCW or QHW by:

Multiply Δрw in table by:

Multiply QCW by:

Multiply QHW by:

Nomenclature

Useful equations:

Q·

Pr = 1.09 x Pr x (tR - tPr)*

ΔtW = Q·

WK/ (500 x CW)

*Q·

Pr equation is based on standard air

6

Quick selection table • Selection Program

Reference Values - Cooling Reference Values - Heating

tR 70 °F tHWS 120 °FtPr 55 °F HW 1.25 GPM

Active

Length

ft

Nozzle

Type

G

H

U

Primary Air Cooling Cooling Heating

PERFORMANCE NOTES:1tot includes CW plus sensible cooling provided by primary air 20°F below room temperature at the flow rate indicated.2CW is coil sensible cooling using 1.25 GPM of chilled water supplied 18°F below the room temperature.3ΔpW is the water head loss at the referenced water supply flow rate.4NET is coil heating using referenced hot water flow rate supplied 50°F above the room temperature.

4

Pr

253545355065456075

tot1

196126233254237432364057280536024371

0.270.530.870.270.550.930.290.510.80

141718612274161221472642182522962738

248031123689266633794022288434834031

Δpt NET4CW

2 Δpw3

4.9

Two-pipe system Four-pipe system

CW2

6.6

Δpw3

Four-pipe system

136917992200155920772557176522212650

G

H

U

6

3550655070906090

120

250934124272310541575166346349306331

0.220.460.770.230.460.760.220.490.87

174723232857201626333207215729713719

290836964408314639244626323442025051

6.89.2

168922482765195125483105208728763601

245133374180304040725064339348356213

Btu/hBtu/hCFM in. H20 ft. H20 ft. H20

Δpw3

ft. H20Btu/h Btu/h

tot1

Btu/h

191325613180232131663972274535274283

tR 75 °F tCWS 57 °FtPr 55 °F CW 1.25 GPM

1.6

2.2

Selection Software

For detailed selections, designers may requestDID-V selection software at sales@troxusa.com.This software (see sample above) affords easyaccess to the beams’ performance data againstuser defined parameters. NOTE: Macros must be enabled for the

spreadsheet to function.

7

Specification · Order details

DID-V - US - 0 - 2 - G - ML - A2 - 0 6 x 6 x 6 KW 0

Specification text

Furnish and install TROX DID-V series active chilled beams in the

quantities, sizes and configurations shown on the project plans and

schedules. The beams shall be constructed and delivered to the job

site as single units. Unit lengths and quantities shall match the

scheduled equipment. No exceptions.

Assembly shall consist of a primary air inlet and upper chamber, a

series of high induction nozzles, a hydronic heat exchanger coil, dis-

charge opening to accept grilles by others.

Primary air is supplied through the integral nozzles, creating induction

of plenum air through the heat transfer coil, where it is reconditioned

and then mixed with the primary air before being discharged through

face opening.

Water entering the heat exchange coil shall be maintained at or above

the dew point temperature of the space. Heat transfer coil shall be

(two-pipe or four-pipe) configuration for cooling only or heating and

cooling operation.

Materials

Diffuser casing shall be constructed of 20 gauge galvanized steel with

natural finish.

Integral heat transfer coil shall be finned tube type with fin spacing not

greater than 8 fins per inch. Water connections shall be plain-ended or

½˝ male NPT. Fin thickness shall be at least 0.0055 inches. Coils shall

be factory leak tested at 360 psi and rated according to AHRI

Standard 410 and delivered clean, flushed and capped. The water

pipes shall be factory fitted with one water drain valve and one vent

per circuit.

Installation

Diffuser shall be constructed for mounting in the application specified.

Mounting brackets, constructed of 14 gauge galvanized steel, shall be

furnished which allow support of the diffuser assembly from the struc-

ture above. Mounting brackets shall be attached to the casing. To

install, connect a circular duct to the unit primary air inlet and chilled

and/or hot water to the appropriate supply and return water connec-

tions.

Submittals

Contractor shall submit dimensional information and a schedule of

performance data for all models and sizes to be furnished, including:

• Primary airflow rate (CFM), temperature (°F) and air side pressure

loss (in. w.g)

• NC level (based on attenuation specified)

• Chilled (and where applicable hot) water supply temperature (°F)

• Chilled (and where applicable hot) water flow rate and

head loss (°F)

• Cooling (and where applicable heating) capacity (BTU/H) and room

temperature (°F)

Connection (optional)

Terminals shall be provided with factory furnished flexible hoses

(12”, 18” or 24”long) for connection of the assembly to the supply and

return water circuits.

/ / /

Type

DID-V

1

2

3

4

5

7

6

Total active x nominal length

4 x 4

5 x 5

6 x 6

Casing finish

0 - Standard self finish

P1 - Flat black

Condensate Drain Connection

0 - Without condensate drain connection

KW - ⅜˝ condensate drain connection for each coil

Inlet Size (nominal)

(see submittal for sizing chart)

12

11

9

Casing/piping handing(See page 3)

Coil ConnectionsPlain (standard) - 01/2” NPT - A2

Border TypeGrille by others - 0

Order example:

Make: TROX

Type: DID-V-US-0-2-G-ML-A2-0/6x6x6/KW/0

8

Order Code

12111087654321 9

10

Nozzle optionsSmall - G

- H

Large - U

Coil circuitryTwo-pipe - 2Four-pipe - 4

Coil CapacitySingle Circuit - USDual Circuit - HC

Face OptionsGrille by others - 0

8

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